NRS70 Series
SECTION 1
NRS70OPS
070803 Version 1 Issue 2
www.snellwilcox.com
1.1
Description - NRS70/NRS70TX
The NRS70 is a powerful frame-recursive noise
reducer. Designed for use in live broadcast and
post-production operations, it also provides an
economical pre-processing solution in DVD
authoring.
The NRS70 provides much improved performance
compared with adaptive technology. It
automatically eliminates almost all background
noise by a combination of techniques and filters.
A sophisticated motion detector seamlessly
switches off the noise reduction in moving picture
areas. A median filter is included to remove
impulse noise, and an additional sparkle filter can
be switched in constantly to provide extra noise
reduction with no compromise in picture quality.
In addition to noise reduction, the NRS70 also
provides multi-standard Y/C, composite and SDI
timebase correction and synchronization. The
composite input automatically detects PAL, NTSC,
NTSC-J, PAL-N, PAL-M, N4.43 and SECAM, and
is sampled and decoded using an adaptive comb
filter to ensure optimum decoding performance.
The signal correction features include RGB gamut
legalizer, luminance and chrominance gain, black
level, NTSC hue, vertical and horizontal
enhancers, Y-C horizontal timing and picture
position. Rugged sync and clock recovery ensure
reliable operation with unstable and noisy inputs.
Signals can be output as digital component SDI or
as broadcast quality composite. The 12-bit output
encoder is fully genlockable to a composite
reference and supports PAL, NTSC, NTSC-J,
PAL-N, PAL-M, N4.43 and SECAM. The NRS70
will also operate as a transcoder between any of
the available standards of the same line rate.
The NRS70 also has two separate AES inputs to
enable audio embedding into any of the eight pairs
of the SDI output. Individual channel routing is also
provided, along with two AES outputs.
Other features include freeze, pattern generation,
and GPI control / audio delay flag output. Full
RollCall remote control is available including
RollTrack for
audio delay tracking.
NRS70
NRS70TX
NRS70, NRS70TX
F
u
s
e
R
O
L
L
C
A
L
L
AES OUT
AES IN
625
AUDIO
REFERENCE
A
B
A
B
A B
INPUTS
525
SDI
1 2
GPI/O
COMPOSITE
Y
C
A B
100-240V~
60/50 Hz
1.8A
T
T2A H 250V
OUTPUTS
COMPOSITE
SDI
1
C
Y
2
1
2
REMOTE
